Distinguishing general relativity from Chern-Simons gravity using gravitational wave polarizations

Quasi-normal modes (QNMs) uniquely characterize the final black-hole. Till now, only the QNM frequency and damping time are used to test General relativity. In this work, we show explicitly that another property of the QNMs --- their polarization --- can be a reliable tool for probing gravity. We pr...

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Bibliographic Details
Published in:arXiv.org 2019-06
Main Authors: Bhattacharyya, Soham, Shankaranarayanan, S
Format: Article
Language:English
Subjects:
Damping
Gravitation
Gravitational waves
Relativity
Template matching
Theory of relativity
Online Access:Get full text
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Summary:Quasi-normal modes (QNMs) uniquely characterize the final black-hole. Till now, only the QNM frequency and damping time are used to test General relativity. In this work, we show explicitly that another property of the QNMs --- their polarization --- can be a reliable tool for probing gravity. We provide a consistent test for General relativity by considering Chern-Simons gravity. Distinguishing Chern-Simons gravity from General relativity using only template matching is highly challenging. Thus a parameter that can differentiate between Chern-Simons gravity and GR will be a suitable candidate for any modified theories of gravity. We discuss the implications of our result for the future gravitational wave detectors.
ISSN:2331-8422
DOI:10.48550/arxiv.1812.00187